Taken from Free Spirit Shawls: "Horseshoe lace edges a generous garter-stitch triangle. Worked in a worsted wool-cotton blend on size US 9 needles, the knitting goes quickly and makes a large, lofty accessory."
This pattern is from Free Spirit Shawls, pg 95 - Rhoeas
Size US 9 24" circular needles (or size needed to obtain gauge) are required but not included.